Happy 40th Birthday, Matt Damon!

By:OK! Staff

Oct. 8 2010, Published 7:50 a.m. ET

Matt Damon is officially over the hill! The filmmaker turned family man turns 40 today and to celebrate we've put together some photo highlights of Matt's achievements!

OK! GALLERY: THE TOWN CAST BRINGS FILM BACK TO HOME BASE — BOSTON!

Matt has always seemed to be able to balance his career and his family. From winning an Oscar with his childhood friend Ben Affleck for Good Will Hunting to having three beautiful children with his wife Luciana Barroso, Matt has made some remarkable achievements in just 40 years!